Instead of "Chris and Jack disagreed during the discussion", one could say "No agreement was reached during the discussion". One may say this is mealy-mouthed, but it seems to me that managing emotions is a supremely important part of being a good communicator and being a consensus-builder. Avoiding the use of language that triggers "fight-or-flight" responses is very useful in many situations.
Behold, the most important thing to know about business writing:
>Chris broke the build.
>The build was broken.
We Chrises can never get a break... unless its the build. -_-
But I think in larger writing pieces, including those technical in nature, these rules produce low quality writing. In my experience it produces extremely curt, choppy writing with overall bad flow. It almost feels like a bulleted list converted to a paragraph, with a sprinklings of "and"s, "so"s and "because"s. And while "flow" sounds like a wishy-washy concept, I think it is effectual and worthy of first level consideration. It shapes how well your ideas synthesize together, and ultimately how well you communicate your thoughts, ideas, and feelings.
Tolstoy's War and Peace would frustrate you to insanity in that case.
What looks like good writing in English may look like childish, repetitive prose in other languages.
Most of the people complaining about the passive have either serious trouble identifying a passive at all, or can't construct an argument why it's bad to save their lives, as amply demonstrated by Geoffrey Pullum. http://www.lel.ed.ac.uk/~gpullum/passive_loathing.pdf Section 2 is a bit technical, but the rest is a great read.
“It was decided that we’d lower shipping prices.” versus “Chris decided to lower our shipping prices.”
I don’t know if writers choose the former because it feels fancier, because they notice other writers doing it (maybe because they struggled to read what was written and took notice of the pattern?), or because they don’t know or don’t want to commit to what actually happened, but it’s incredibly frustrating to read a sea of passively voiced sentences about what happened.